| MLS | mean lifespan; median life span; median longitudinal section; microphthalmia-linear skin defects [sy... |
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| MCHC | maternal/child health care; mean corpuscular hemoglobin concentration; mean corpuscular hemoglobin c... |
| MIP | macrophage inflammatory protein; major intrinsic protein; maximum inspiratory pressure; maximum inte... |
| MST | maximal stimulation test; mean survival time; mean swell time; mercaptopyruvate sulfurtransferase; m... |
| MSV | maximum sustained level of ventilation; mean scale value; mean spatial velocity; Moloney sarcoma vir... |
| mean high water | <marine biology> The average height of the high water over a 19-year period. For shorter periods of observation, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. All high-waters heights are included in the average where the type of tide is either semidiurnal or mixed. Only the higher high-water heights are included in the average where the type of tide is diurnal. So determined, mean high water in the latter case is the same as mean higher high water. (09 Oct 1997) |
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| mean lower low water | <marine biology> The average height of the lower low waters over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. (09 Oct 1997) |
| mean low water | <marine biology> The average height of the low waters over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. All low-water heights are included in the average where the type of tide is either semidiurnal or mixed. Only the lower low-water heights are included in the average where the type of tide is diurnal. So determined, mean low water in the latter case is the same as mean lower low water. (09 Oct 1997) |
| mean manifest vector | A single cardiac vector representing the average of all vector's present during a given time interval. Synonym: mean manifest vector. (05 Mar 2000) |
| mean sea level | <marine biology> A tidal datum: the arithmetic mean of hourly water elevations observed over a specific 19-year cycle. Points on land can be referenced to a mean sea level, in which case the datum assumes zero elevation. (09 Oct 1997) |
| mean temperature | The average atmospheric temperature in any locality for a designated period of time, as a month or a year. (05 Mar 2000) |
| mean vector | A single cardiac vector representing the average of all vector's present during a given time interval. Synonym: mean manifest vector. (05 Mar 2000) |
| regression of the mean | If, for a symmetrical population with a single mode, a measurement, selected because it is extreme, is repeated, on average the second reading will be closer to the mean than the first. (05 Mar 2000) |
| harmonic mean | The mean calculated as the number of values being averaged, divided by the sum of their reciprocals. (05 Mar 2000) |
| hypothetical mean organism | A hypothetical organism whose characters are the means of the positive characters of the organisms which belong to the same taxon as the HMO, as opposed to the calculated mean organism. (05 Mar 2000) |
| hypothetical mean strain | A hypothetical strain that possesses the characteristics of a calculated mean organism. (05 Mar 2000) |
| standard error of the mean | A statistical index of the probability that a given sample mean is representative of the mean of the population from which the sample was drawn. (05 Mar 2000) |
| law of regression to mean | In a population mating at random, the progeny of a parent with an extreme value for a measurable phenotype will tend on average to have values nearer the population mean than in the extreme parent. See: law of regression to mean. Synonym: law of regression to mean. (05 Mar 2000) |
| advanced life support | Definitive emergency medical care that includes defibrillation, airway management, and use of drugs and medications. Compare: basic life support. (05 Mar 2000) |
| artificial life | Artificial life (AL, alife) is a scientific discipline in whichresearchers study life by creating computer programs that recreatebiological systems from scratch. (09 Oct 1997) |